Method of forming brake-shoes.



J. D. GALLAGHER & H. JONES.

METHOD OF FORMING BRAKE SHOES.

APPLICATION FILED MAY 4. I915.

Patented Nov. 16, 1915.

, l/Vl/EAITORS WAR/9r Liar 8 27 6 a//g/er INTO/WE) JOSEPH n. GALLAGHER,\OF GLEN RIDGE, NEW JERSEY, AND-HARRY JONES, or SUFFERN, NEW YORK, ASSIGNORS T0 AMERICAN BRAKE SHOE & FOUNDRY COMPANY, OF MAHWAH, NEW JERSEY, A coEroaA'rIoN on NE JERSEY.

METHOD OF FORMING BRAKE-SHOES.

Specification of Letters Patent.

Patented Nov. to, 1915-.

Application filed my a, 1915. Serial No. 25,684.

To all whom it may concern:

Be it known that we, JOSEPH D. GAL- LAGHER, a citizen of the United States, and a resident of Glen Ridge, county'of Essex, and State of New Jersey, and HARRY JONES, a citizen of the United States, and a resident-0f Suifern, in the county of Rockland and State of New York, have made and invented certain new and useful Improvements in Methods of Forming Brake-Shoes, of which the following is a specification.

This invention relates to a method of forming brake Shoes, and more particularly to that type which includes a composite wearing face.

In forming brake shoes having hard and soft metal sections, the usual practice has been to make an integral casting and to harden or'chill certain portions thereof, but it has been extremely difficult. to obtain a metal which, at once combines the requisite properties for the formation of the hard and soft sections. It oftentimes happens that the metal, in order that it may harden or chill properly, will be too hard, and the unchilled sections will not possess the desired frictional qualities, and, on the other hand,

in incorporating in the metal the proper frictional qualities for the soft sections, there is danger of the metal becoming incapable of taking a chill or hardening, so that the shoe will not possess the desired lasting or wearing properties. In order to overcome these difliculties, we provide a process, as hereinafter disclosed, whereby a substantially uniform product can be obtained,

each brake shoe combining the same frictional and wearing qualities.

A further object of the invention is to provide a method whereby the'various Sections which go to make up the completed shoe, will be spaced apart a slight distance,

' allowing the various sections to expand inde- I ternally reinforced.

pendently, and providing for a large heat radiating surface. y

A further object is to provide a method of forming brake shoes whereby the resulting shoes will be made up of a plurality of sections formed of relatively hard and soft metals, and in which is embedded a reinforcing member of expanded metal or wire mesh, whereby the various sections are tied and anchored together, as well as being inof one of the hard metal end sections, the reinforcing back, with its bundle of wire mesh or expanded metal, being illustrated on end and within a chilling mold. Fig. 2 discloses the manner in which the opposite or remote hard metal end section is cast; Fig. 3 is a view in side section of the Shoe in position within a mold for the casting of the central or intermediate section; Fig. 4; is a view in front elevation of the completed shoe; Fig. 5 is a back view thereof; and Fig. 6 is a View in longitudinal section of the same.

In carrying out the various steps of our method, a reinforcing back 10, is provided with a bundle of expanded metal or wire mesh 11, which is secured to the reinforcing back, so that it will be incorporated in, and form a part of, the body of the Shoe, which is cast therearound.

The reinforcing back with the openwork metal reinforcing member is placed on end, in the mold 12 which may be adapted to impart a chill to the metal, and the mold is .so arranged'as to receive only the end portion of the shoe therein. The metal, which may possess chilling properties, is then poured within the mold, whereby the end of the reinforcing back is embedded within the cast metal, and thehard end section 13 as thus formed is securely anchored thereto. The.

metal of the hard end section flows throughout the various interstices of the openwork metal of the reinforcing member, and is materially reinforced thereby. The reinforcing back, with its bundle of openwork metal, is

preferably tilted or inclined toward its "to the casting of the adjacent, or end secof hard metal are cast' upon, and securely anchored to, the ends of the reinforcing back, and are themselves reinforced throughout by the openwork metal 11.

After the end sections have cooled, the partially formed brake shoe is placed within the third mold 1 1, as illustrated in Fig. 3, and the intermediate or .central section 15 is cast, the brake shoe being preferably in a horizontal position during this last-mentioned procedure. The soft metal central section thus becomes securely anchored to the. reinforcing back, as well as being internally reinforced by the openwork metal 11 and bound or tied to the adjacent hard metal sections. Inasmuch as'the central or intermediate section is cast at'a time subsequent tions, the metal of the central section will draw away slightly from the adjoining sec tions, and in so doing will leave a slight space 16 between adjacent sections, materially increasing the radiating surface of -the shoe body, so as to provide for the dissipation of frictional heat, as well as providing for the independent expansion of each section, and eliminating the accumulative effect thereof, which, in the continuous or integral shoe, tends to straighten the same out, as it becomes heated in service. U

The manner in which the sections are cast,

I allows each section to be built up or formed to any desired height, and it is also to be understood in this connection that the relative arrangement of hard and soft sections, and their number, may be-varied as desired.

What we claim is 1. They method of forming brake shoes with isolated wearing sections consisting in casting upon a reinforcing back, Wearing sections, each section being allowed to cool prior to the casting of the next section.

2. The method of forming brake shoes,

consisting in casting, upon a reinforcing back and a bundle of openwork metal, wearend sections, allowing said sections to set, V

and then casting upon said back the intermediate section.

1. The method of forming brake shoes consisting in placing a reinforcing back on end within a mold, casting an end section thereto, inverting said reinforcing back, and casting the other of the end sections thereto, allowingsaid end sections to cool, and then casting the intermediate section.

'5. The method hereinbefore described, consisting in placing a reinforcing back with an openwork metal member attached thereto on end in a mold, casting an end section thereto, inverting said reinforcing back and openwork metal member, and casting the other of the end sections thereto, allowing said end sections to cool, and casting the intermediate section against the confronting edges of the end sections.

6. The method of forming brake shoes consisting in casting one end section of the shoe, then casting the opposite end section of the shoe, and thirdly casting the intermediate section of the shoe between the confronting edges of the end sections.

Signed at New York, borough of Manhattan, county of New York, and State of New York, this 30th day of April, 1915 JOSEPH D. GALLAGHER.

Witnesses:

ANNA V. WALSH, GEORGE E. COOK.

Signed at Suffern, in the county of Rockland and State of New York,'this 30th day of April, 1915.

HARRY JONES.

Witnesses:

FRED B. HOAGLAND, WALLACE SUTHERLAND. 

